/* ============================================================
   DR. SHIH DENTAL — styles.css
   Paleta exacta:
     --celeste:  #C5DDE8  (hero, sección tratamientos)
     --negro:    #0A0A0A  (secciones de autoridad)
     --crema:    #F8F4ED  (secciones cálidas)
     --burdeos:  #A01828  (CTAs, acentos principales)
     --dorado:   #C9A961  (detalles muy puntuales)
     --blanco:   #FFFFFF
     --gris:     #4A4A4A  (texto cuerpo)
     --gris-claro: #C0C0C0 (texto sobre fondo oscuro)
   ============================================================ */


/* ================================================================
   1. RESET & VARIABLES
   ================================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --celeste:    #C5DDE8;
  --negro:      #0A0A0A;
  --crema:      #F8F4ED;
  --burdeos:    #A01828;
  --dorado:     #C9A961;
  --blanco:     #FFFFFF;
  --gris:       #4A4A4A;
  --gris-claro: #C0C0C0;

  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Espaciado responsivo para secciones */
  --section-pad: clamp(80px, 10vw, 140px);
  /* Ancho máximo del contenido */
  --max-w: 1280px;
  --max-w-narrow: 800px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--sans);
  color: var(--gris);
  background: var(--blanco);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }


/* ================================================================
   2. UTILIDADES GLOBALES
   ================================================================ */

/* Contenedor centrado */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
}

/* Contenedor angosto para texto largo */
.container--narrow {
  max-width: var(--max-w-narrow);
}

/* Pre-títulos: etiquetas pequeñas en mayúsculas */
.pre-title {
  display: block;
  font-family: var(--sans);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gris);
  margin-bottom: 1.2rem;
}

.pre-title--red  { color: var(--burdeos); }
.pre-title--gold { color: var(--dorado); }

/* Títulos de sección */
.section-title {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--negro);
  margin-bottom: 1.5rem;
}

.section-title--white { color: var(--blanco); }

/* Texto cuerpo */
.body-text {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--gris);
}

.body-text p + p { margin-top: 1.3em; }

/* Versión clara para fondos oscuros */
.body-text--light {
  color: var(--gris-claro);
  font-weight: 300;
}

/* Header de sección centrado */
.section-header--centered {
  text-align: center;
  margin-bottom: clamp(40px, 6vw, 80px);
}

/* Botón principal burdeos */
.btn-primary {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--burdeos);
  color: var(--blanco);
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.2s ease;
  border: none;
}

.btn-primary:hover {
  background: #c01e30;
  transform: translateY(-2px);
}

/* Link discreto (CTA secundario hero) */
.btn-link-subtle {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--gris);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.btn-link-subtle:hover {
  border-color: var(--gris);
}


/* ================================================================
   3. ANIMACIONES DE SCROLL — Intersection Observer
   ================================================================ */

/* Estado inicial: invisible y desplazado */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.85s ease-out, transform 0.85s ease-out;
}

.reveal-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 0.85s ease-out, transform 0.85s ease-out;
}

.reveal-right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity 0.85s ease-out, transform 0.85s ease-out;
}

/* Estado final al entrar en viewport */
.reveal.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: translate(0);
}

/* Stagger para tarjetas en grid */
.stagger-1 { transition-delay: 0s; }
.stagger-2 { transition-delay: 0.15s; }
.stagger-3 { transition-delay: 0.30s; }

/* Animación keyframe para hero (carga inicial, no scroll) */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}


/* ================================================================
   4. NAVBAR
   ================================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background 0.45s ease, box-shadow 0.45s ease;
}

/* Al hacer scroll: fondo blanco sólido */
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 1px 24px rgba(0, 0, 0, 0.07);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(20px, 5vw, 80px);
}

/* Logo */
.navbar-logo {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--negro);
  display: flex;
  align-items: baseline;
  gap: 0.15em;
  transition: color 0.4s;
}

/* En hero transparente: texto en negro (el hero es celeste claro) */
.navbar-logo { color: var(--negro); }

/* Kanji decorativo */
.logo-kanji {
  color: var(--burdeos);
  font-size: 0.8em;
}

/* Links de navegación */
.navbar-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar-links a:not(.btn-nav-cta) {
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--gris);
  transition: color 0.3s;
}

.navbar-links a:not(.btn-nav-cta):hover { color: var(--negro); }

/* CTA en navbar */
.btn-nav-cta {
  padding: 0.6rem 1.4rem;
  background: var(--burdeos);
  color: var(--blanco) !important;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: background 0.3s ease;
}

.btn-nav-cta:hover { background: #c01e30 !important; }

/* ---- Hamburger ---- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--negro);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Animación X al abrirse */
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Menú mobile ---- */
.mobile-menu {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--blanco);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.mobile-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.mobile-menu a:not(.btn-nav-cta) {
  font-size: 0.95rem;
  color: var(--gris);
  transition: color 0.3s;
}

.mobile-menu a:not(.btn-nav-cta):hover { color: var(--negro); }


/* ================================================================
   5. SECCIÓN 1 — HERO
   ================================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  background: var(--celeste); /* rellena los lados del video cuadrado */
  overflow: hidden;
  /* flex se mueve a hero-parallax para que no interfiera con el transform */
}

/* Wrapper de parallax + fade. JS modifica transform y opacity en este div. */
.hero-parallax {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  will-change: transform, opacity;
}

/* Wrapper del video: centrado, relación 1:1 (cuadrado) */
.hero-video-wrapper {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  height: 100%;
  aspect-ratio: 1 / 1; /* video cuadrado 2048×2048 */
  z-index: 0;
  overflow: hidden;
}

/* Video único del hero */
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Degradado para tapar watermark KlingAI en esquina inferior derecha del video.
   El color coincide con --celeste para fundirse con el fondo hero. */
.watermark-cover {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 38%;
  height: 16%;
  background: linear-gradient(
    to top left,
    var(--celeste) 28%,
    rgba(197, 221, 232, 0.85) 52%,
    transparent 75%
  );
  z-index: 2;
  pointer-events: none;
}

/* Difuminado lateral: funde borde del video con el fondo celeste del hero */
.hero-video-wrapper::before,
.hero-video-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 10%;
  z-index: 1;
  pointer-events: none;
}

.hero-video-wrapper::before {
  left: 0;
  background: linear-gradient(to right, var(--celeste), transparent);
}

.hero-video-wrapper::after {
  right: 0;
  background: linear-gradient(to left, var(--celeste), transparent);
}

/* Contenido del hero sobre el video */
.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 0 clamp(20px, 5vw, 80px);
  max-width: 920px;
}

/* Animaciones escalonadas al cargar */
.hero-pretitle {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards 0.2s;
  margin-bottom: 1.4rem;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 4rem);
  font-weight: 400;
  color: var(--negro);
  line-height: 1.18;
  margin-bottom: 1.4rem;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards 0.4s;
}

/* La segunda frase va en cursiva */
.hero-title em {
  display: block;
  font-style: italic;
}

.hero-subtitle {
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--gris);
  letter-spacing: 0.06em;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards 0.6s;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards 0.8s;
}


/* ================================================================
   6. SECCIÓN 2 — PROBLEMA
   ================================================================ */
.section-problema {
  background: var(--crema);
  padding: var(--section-pad) 0;
}

.section-problema .section-title { margin-top: 0.4rem; }

/* Cita con línea lateral burdeos */
.quote-burdeos {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-style: italic;
  font-weight: 400;
  color: var(--negro);
  line-height: 1.55;
  border-left: 3px solid var(--burdeos);
  padding: 0.6rem 0 0.6rem 1.6rem;
  margin-top: 2.8rem;
}


/* ================================================================
   7. SECCIÓN 3 — DOCTOR
   ================================================================ */
.section-doctor {
  background: var(--negro);
  padding: var(--section-pad) 0;
}

/* Grid desktop: imagen a la izquierda ocupa ambas filas; encabezado y cuerpo en la derecha */
.doctor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(40px, 6vw, 100px);
  row-gap: 0;
  align-items: start;
}

.doctor-image-col   { grid-column: 1; grid-row: 1 / 3; }
.doctor-content-top { grid-column: 2; grid-row: 1; }
.doctor-content-bottom { grid-column: 2; grid-row: 2; }

/* Placeholder de imagen del doctor */
.image-placeholder {
  aspect-ratio: 3 / 4;
  background: linear-gradient(160deg, #1a1a1a, #2a2a2a);
  border: 1px solid var(--dorado);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Texto del placeholder via CSS para no ensuciar el HTML */
.image-placeholder::after {
  content: attr(data-label);
  font-family: var(--sans);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--dorado);
  text-align: center;
  padding: 1rem;
  opacity: 0.8;
}

.doctor-content-bottom .body-text { margin-bottom: 2.8rem; }

/* Credenciales: 3 columnas con divisores dorados */
.credentials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(201, 169, 97, 0.3);
}

.credential {
  padding: 1.4rem 1rem 1.4rem 0;
  border-right: 1px solid rgba(201, 169, 97, 0.3);
}

.credential:last-child  { border-right: none; }
.credential:not(:first-child) { padding-left: 1.2rem; }

.credential-label {
  display: block;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 400;
  color: var(--blanco);
  margin-bottom: 0.3rem;
}

.credential-sub {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--gris-claro);
}


/* ================================================================
   8. SECCIÓN 4 — TRATAMIENTOS
   ================================================================ */
.section-tratamientos {
  background: var(--celeste);
  padding: var(--section-pad) 0;
}

.intro-text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--gris);
  max-width: 600px;
  margin: 0.8rem auto 0;
}

/* Grid de 3 tarjetas */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: clamp(2rem, 4vw, 3.5rem);
}

.card {
  background: var(--blanco);
  padding: clamp(1.8rem, 3vw, 2.8rem);
  display: flex;
  flex-direction: column;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  cursor: default;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

/* Tarjeta destacada: borde superior burdeos */
.card--featured { border-top: 4px solid var(--burdeos); }

.card-badge {
  display: inline-block;
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--burdeos);
  margin-bottom: 1.2rem;
}

.card-title {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--negro);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.card-text {
  font-size: 0.87rem;
  line-height: 1.8;
  color: var(--gris);
  flex: 1;
  margin-bottom: 1.8rem;
}

/* Link de tarjeta: arrow animado al hover */
.card-link {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--burdeos);
  letter-spacing: 0.03em;
  transition: letter-spacing 0.3s ease;
  display: inline-block;
}

.card-link:hover { letter-spacing: 0.07em; }


/* ================================================================
   9. SECCIÓN 5 — CASOS Y PROCESO
   ================================================================ */
.section-casos {
  background: var(--blanco);
  padding: var(--section-pad) 0;
}

/* Grid 2 columnas */
.casos-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 7vw, 100px);
  align-items: start;
}

.casos-col .body-text { margin-bottom: 2rem; }

/* Galería antes/después */
.casos-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 1.5rem;
}

.caso-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.caso-label {
  font-family: var(--sans);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--burdeos);
}

/* Placeholder cuadrado para casos */
.image-placeholder-square {
  aspect-ratio: 1 / 1;
  background: linear-gradient(145deg, var(--crema), #e8e0d0);
  border: 1px solid var(--dorado);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--dorado);
  text-align: center;
  padding: 0.5rem;
  white-space: pre-line; /* para saltos de línea en data-label */
}

.image-placeholder-square::after {
  content: attr(data-label);
}

/* Pasos del proceso */
.proceso-col .section-title { margin-bottom: 1.8rem; }

.proceso-steps {
  display: flex;
  flex-direction: column;
}

.step {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.2rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--dorado); /* separador dorado */
}

.step:last-child { border-bottom: none; }

.step-number {
  font-family: var(--serif);
  font-size: 2.4rem;
  font-weight: 400;
  color: var(--burdeos);
  line-height: 1;
}

.step-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--negro);
  margin-bottom: 0.5rem;
}

.step-text {
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--gris);
}


/* ================================================================
   10. SECCIÓN 6 — POR QUÉ DR. SHIH
   ================================================================ */
.section-porque {
  background: var(--negro);
  padding: var(--section-pad) 0;
}

/* Lista de razones en una columna con números grandes */
.razones-list {
  display: flex;
  flex-direction: column;
  margin-top: clamp(2rem, 4vw, 3.5rem);
}

.razon {
  display: grid;
  grid-template-columns: clamp(4rem, 7vw, 7rem) 1fr;
  gap: clamp(1.5rem, 4vw, 5rem);
  align-items: start;
  padding: 3rem 0;
  border-bottom: 1px solid rgba(201, 169, 97, 0.25);
}

.razon:last-child { border-bottom: none; }

/* Número grande dorado */
.razon-num {
  font-family: var(--serif);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 400;
  color: var(--dorado);
  line-height: 1;
}

.razon-title {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 400;
  color: var(--blanco);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.razon-text {
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--gris-claro);
  font-weight: 300;
}


/* ================================================================
   11. SECCIÓN 7 — TESTIMONIOS
   ================================================================ */
.section-testimonios {
  background: var(--crema);
  padding: var(--section-pad) 0;
}

.testimonios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: clamp(2rem, 4vw, 3.5rem);
}

.testimonio {
  background: var(--blanco);
  padding: clamp(1.8rem, 3vw, 2.5rem);
  display: flex;
  flex-direction: column;
}

/* Comilla decorativa grande en dorado */
.testimonio-comilla {
  font-family: var(--serif);
  font-size: 4.5rem;
  line-height: 0.85;
  color: var(--dorado);
  display: block;
  margin-bottom: 0.8rem;
  opacity: 0.55;
}

.testimonio-cita {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--gris);
  flex: 1;
  margin-bottom: 1.5rem;
}

/* Línea separadora dorada */
.testimonio-divider {
  height: 1px;
  background: var(--dorado);
  opacity: 0.45;
  margin-bottom: 1.2rem;
}

.testimonio-nombre {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--negro);
  margin-bottom: 0.2rem;
}

.testimonio-tratamiento {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--gris);
}


/* ================================================================
   12. SECCIÓN 8 — CTA FINAL
   ================================================================ */
.section-cta {
  background: var(--burdeos);
  padding: clamp(100px, 12vw, 160px) 0;
}

.cta-header {
  text-align: center;
  margin-bottom: 3rem;
}

.cta-header .section-title { margin-bottom: 1.2rem; }

.cta-subtitle {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--crema);
  max-width: 580px;
  margin: 0 auto;
  opacity: 0.9;
}

/* Caja blanca del formulario */
.cta-form-wrapper {
  background: var(--blanco);
  padding: clamp(2rem, 4vw, 3.5rem);
  border-radius: 2px;
  margin-top: 2rem;
}

.contact-form { margin-bottom: 2rem; }

.form-group { margin-bottom: 1.5rem; }

.form-group label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gris);
  margin-bottom: 0.5rem;
}

.label-optional {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: #999;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid #e0e0e0;
  border-radius: 0;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--negro);
  background: var(--blanco);
  transition: border-color 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--burdeos);
}

.form-group textarea { resize: vertical; min-height: 90px; }

/* Botón de envío: negro → burdeos al hover */
.btn-form-submit {
  width: 100%;
  padding: 1rem;
  background: var(--negro);
  color: var(--blanco);
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  border: none;
  transition: background 0.3s ease;
}

.btn-form-submit:hover { background: var(--burdeos); }

/* Contacto directo */
.cta-direct-contact {
  border-top: 1px solid #e8e8e8;
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.direct-contact-label {
  font-size: 0.72rem;
  color: #999;
  margin-bottom: 0.2rem;
}

.direct-contact-link {
  font-size: 0.88rem;
  color: var(--gris);
  transition: color 0.3s;
}

.direct-contact-link:hover { color: var(--burdeos); }


/* ================================================================
   13. FOOTER
   ================================================================ */
.footer {
  background: var(--negro);
  padding: clamp(60px, 8vw, 100px) 0 0;
}

/* Grid 4 columnas */
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(25px, 4vw, 55px);
  padding-bottom: clamp(50px, 6vw, 80px);
}

/* Logo grande del footer */
.footer-logo {
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--blanco);
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
}

.footer-kanji {
  color: var(--burdeos);
  font-size: 0.8em;
}

.footer-tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--gris-claro);
  margin-bottom: 0.8rem;
}

.footer-services {
  font-size: 0.76rem;
  color: rgba(192, 192, 192, 0.5);
  line-height: 1.65;
}

/* Títulos de columna footer */
.footer-col-title {
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--dorado);
  margin-bottom: 1.2rem;
}

.footer-link {
  display: block;
  font-size: 0.82rem;
  color: rgba(192, 192, 192, 0.65);
  margin-bottom: 0.6rem;
  transition: color 0.3s;
}

.footer-link:hover { color: var(--blanco); }

.footer-text {
  font-size: 0.82rem;
  color: rgba(192, 192, 192, 0.65);
  line-height: 1.8;
}

.footer-closed {
  font-size: 0.72rem;
  color: rgba(192, 192, 192, 0.3);
  margin-top: 0.5rem;
}

/* Fila inferior copyright */
.footer-bottom {
  text-align: center;
  padding: 1.5rem 0;
}

.footer-line {
  height: 1px;
  background: rgba(201, 169, 97, 0.2);
  margin-bottom: 1.5rem;
}

.footer-bottom p {
  font-size: 0.7rem;
  color: rgba(192, 192, 192, 0.28);
  letter-spacing: 0.05em;
}


/* ================================================================
   14. BOTÓN FLOTANTE WHATSAPP
   ================================================================ */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 900;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blanco);
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.38);

  /* Oculto por defecto, aparece al scroll */
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease, box-shadow 0.3s ease;
  pointer-events: none;
}

.whatsapp-float.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.whatsapp-float:hover {
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.55);
  transform: translateY(-2px);
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
}

/* Pulso radial cada 5 segundos */
.whatsapp-float.pulse::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(37, 211, 102, 0.35);
  animation: waPulse 1.4s ease-out forwards;
}

@keyframes waPulse {
  0%   { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(1.9); opacity: 0; }
}


/* ================================================================
   15. RESPONSIVE — TABLET (≤ 1024px)
   ================================================================ */
@media (max-width: 1024px) {

  /* Footer: 2×2 */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  /* Tarjetas: apilar en columna única centrada */
  .cards-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  /* Testimonios: columna única */
  .testimonios-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  /* Razones: reducir gap del número */
  .razon { gap: 2rem; }
}


/* ================================================================
   16. RESPONSIVE — MOBILE (≤ 768px)
   ================================================================ */
@media (max-width: 768px) {

  /* ── Navbar ── */
  .navbar-links        { display: none; }
  .hamburger           { display: flex; }
  .mobile-menu.open    { display: flex; } /* solo visible cuando está abierto */

  /* Header compacto: máximo ~50px de alto */
  .navbar-inner {
    padding: 9px 20px;
  }
  .navbar-logo {
    font-size: 1rem;
    line-height: 1;
  }
  .hamburger { padding: 2px; }
  .hamburger span { width: 22px; }

  /* ── Hero ── */
  /* El video llena todo el hero (object-fit:cover recorta el cuadrado para
     rellenar 100vw × 100vh sin dejar huecos ni desplazamientos). */
  .hero-video-wrapper {
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: none;
    aspect-ratio: unset;
  }

  /* Sin difuminado lateral en móvil (el video ya cubre todo el ancho) */
  .hero-video-wrapper::before,
  .hero-video-wrapper::after { display: none; }

  /* Título del hero más pequeño para que no ocupe 5 líneas */
  .hero-title { font-size: 1.75rem; }

  /* CTAs del hero apilados */
  .hero-ctas { flex-direction: column; gap: 1rem; }

  /* ── Contenedor ── */
  /* Padding lateral mínimo garantizado en todos los contenedores */
  .container { padding: 0 24px; }

  /* ── Doctor ── */
  /* Reducir padding superior de la sección */
  .section-doctor { padding-top: 60px; }

  /* En móvil: flex column con reorden (título → foto → texto/credenciales) */
  .doctor-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .doctor-content-top    { order: 1; margin-bottom: 2rem; }

  .doctor-image-col {
    order: 2;
    width: 85%;
    margin: 0 auto 2rem;
  }

  .doctor-content-bottom { order: 3; }

  /* ── Credenciales ── */
  .credentials { grid-template-columns: 1fr; }

  .credential {
    border-right: none;
    border-bottom: 1px solid rgba(201, 169, 97, 0.3);
    padding: 1.2rem 0;
  }

  .credential:last-child { border-bottom: none; }
  .credential:not(:first-child) { padding-left: 0; }

  /* ── Tarjetas tratamientos ── */
  .cards-grid { grid-template-columns: 1fr; max-width: 100%; }

  /* ── Casos y proceso ── */
  .casos-grid { grid-template-columns: 1fr; gap: 3rem; }

  /* Galería antes/después: apilar en móvil */
  .casos-gallery { grid-template-columns: 1fr; gap: 16px; }

  /* ── Testimonios ── */
  .testimonios-grid { grid-template-columns: 1fr; max-width: 100%; }

  /* ── Por qué ── */
  .razon { grid-template-columns: 1fr; gap: 0.6rem; }
  .razon-num { font-size: 3rem; }

  /* ── Footer ── */
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }

}


/* ================================================================
   17. RESPONSIVE — MOBILE PEQUEÑO (≤ 480px)
   ================================================================ */
@media (max-width: 480px) {

  /* Botón WhatsApp: separación mínima 24px de bordes */
  .whatsapp-float { width: 48px; height: 48px; bottom: 1.5rem; right: 1.5rem; }
  .whatsapp-float svg { width: 24px; height: 24px; }

}